Reclining Lounge Chair

ABSTRACT

An improved reclining lounge chair is described, which comprises a footrest that is pivotally connected to a center seat member by a footrest attachment axle, and in which the footrest position is controlled by a footrest lift mechanism. While the lounge chair is its non-reclined upright position the footrest is oriented approximately vertical. In this approximately vertical orientation the footrest doesn&#39;t extend significantly forward of the center seat member, thus allowing an occupant easy access to the chair from the front. In its fully reclined position the footrest rotates into an approximately horizontal orientation, providing a comfortable reclined position.

CROSS-REFERENCE TO RELATED APPLICATIONS

This is a continuation of international patent application PCT/EP2007/006864, filed Aug. 2, 2007, which designated the United States, and which claimed priority to German patent application No. 10 2006 039 278.7, filed Aug. 22, 2006. These applications are hereby incorporated by reference.

TECHNICAL FIELD

The present invention generally relates to a reclining lounge chair, and more particularly, to a reclining lounge chair comprising a footrest lift mechanism.

BACKGROUND OF THE INVENTION

Lounge chairs, which can be adjusted between an upright position and a reclined position, are well known. A category-defining reclining lounge chair is described in FR 635,465 A. This known chair comprises a footrest, which is connected to a seat by a horizontal pivot axis. An adjusting lever mechanism is provided, which is pivotally supported by a horizontal support axle relative to the frame. The opposite end of the adjusting lever mechanism is pivotally supported by the footrest through a horizontal support axle.

A reclining lounge chair comprising a seat, a backrest, and a footrest, is described in EP 0,358,666 B1, invented by the same inventor hereof. The backrest is pivotally joined to the seat by a horizontal axle, and the seat is pivotally joined to the footrest by a horizontal axle, respectively. Thereby, the seating and lounge chair can be folded, such that the footrest, the seat, and the backrest are located essentially parallel to each other.

The reclining lounge chair of EP 0,358,666 can be adjusted into a semi-reclined lounge position, in which the backrest points upward and rearward, extending from the rear end of the seat. The footrest points downward and forward from the front end of the seat towards the floor. From this position the lounge chair can be adjusted into a fully reclined sleeping position, in which footrest, seat, and backrest are essentially located in a continuous horizontal plane. This style of reclining lounge chairs has been well accepted in the market.

In variation therefrom other reclining lounge chairs exist. Reclining lounge chairs are known, which comprise an integral couch frame comprising a center seat section, a backrest section, and footrest section. In such chairs the backrest section is positioned at a fixed predetermined small angle relative to the center seat section, and the center seat section is positioned at a fixed predetermined small angle relative to the footrest section. The integral couch frame can pivot about a single horizontal axis relative to a base frame. Such lounge chairs, known as “health loungers”, can often be found in baths, sanatoriums, etc. An occupant can adjust such lounge chairs by shifting his or her weight. The lounge chair can typically be adjusted between an upright position, in which the front end of the integral couch frame touches the floor, and a fully reclined position, in which the footrest is aligned approximately horizontal.

An advantage of these “health loungers” is their simple design, since the entire couch frame is connected with the base frame by a single horizontal axle, around which the chair can pivot. No further hinges between backrest and seat or between seat and footrest are provided. Disadvantageous, however, is that getting in and out of such couches is cumbersome, especially for elderly persons. In order to sit down an occupant may enter from the front, but that requires walking backward with legs spread far apart to clear the footrest. Alternatively an occupant can attempt to enter or exit the couch from the side, but that is difficult due to armrests blocking access to the couch from the side.

Based on the previously described “health lounger” it is an object of the current invention to provide an improved reclining lounge chair, that can be adjusted between at least an upright position and a reclined position, and that has ergonomic advantages over known health loungers.

SUMMARY OF THE INVENTION

In one aspect of the invention, a reclining lounge chair is provided, which comprises a footrest that is pivotally connected to a center seat member by a footrest attachment axle. A footrest lift mechanism is operatively connected to the footrest. The footrest lift mechanism causes the footrest to rotate about the footrest attachment axle as the lounge chair is reclined. While the lounge chair is in its non-reclined, upright position, the footrest is oriented approximately vertical. In this approximately vertical orientation the footrest doesn't extend significantly forward of the center seat member, thus allowing an occupant easy access to the chair from the front. The center seat member may be at a height from the floor that is typical for chairs, which allows an occupant to easily get in and out of the lounge chair while in the upright position. This ergonomic design is a significant improvement over the previously described health lounges, which have fixed footrests that extend forward of the center seat member at all times.

The reclining lounge chair may comprise a seat and backrest subassembly, which is pivotally connected to a base frame by a seat attachment axle. Also operatively connected to the base frame is the rear end of the footrest lift mechanism. The front end of the footrest lift mechanism is operatively connected to the footrest. An occupant may adjust the lounge chair from the upright position into a reclined position, simply by shifting his or her weight. This causes the seat and backrest subassembly to rotate about the seat attachment axle. Rotation of the seat and backrest subassembly causes the footrest lift mechanism to simultaneously rotate the footrest about the footrest attachment axle relative to the center seat member. When the lounge chair reaches its fully reclined position the footrest may have rotated from its original approximately vertical orientation into an approximately horizontal orientation, thus providing a comfortable sleeping position.

To exit, the lounge chair may be adjusted back into the upright position. During the adjustment the footrest lift mechanism causes the footrest to rotate from its approximately horizontal orientation back into its approximately vertical orientation, pointing downward from the footrest attachment axle towards the floor. The vertical orientation of the footrest while the chair is in its upright position allows an occupant to easily exit, as the footrest does not obstruct the exit path.

Generally, recliners are known, which through a weight shift or by adjusting the backrest, allow a footrest to rotate into an elevated position. Such recliners, however, comprise comparatively complex adjustment mechanisms, often including scissor style rods. In contrast, the disclosed design is relatively simple, and requires only a single footrest lift mechanism. Due to its simple design the described lounge chair may be used outdoors, for examples in backyards or baths, or commercially, e.g. in hospitals, indoor public swimming pools, etc.

In another aspect of the invention, the footrest lift mechanism may comprise two footrest lift bars, one on each side of the lounge chair. Each footrest lift bar may be pivotally connected at its front end to the footrest by a front footrest lift axle, and at its rear end to the base frame by a rear footrest lift axle. The footrest lift bars may be aligned almost congruent with the center seat member. To achieve this, the rear footrest lift axle may be located close to the seat attachment axle, preferably below and/or in front of the seat attachment axle. Similarly, the front footrest lift axle may be located close to the footrest attachment axle, and preferably in front of the footrest attachment axle. The footrest may comprise an embedded extension shape to provide sufficient attachment space for both the footrest lift axle and the footrest attachment axle.

In a further aspect of the invention, the front footrest lift axle and the rear footrest lift axle may be located such, that a line drawn from the front to the rear footrest lift axle intersects a line drawn from the footrest attachment axle to the seat attachment axle.

In yet another aspect of the invention a latch mechanism may be provided to prevent the reclining chair from changing its position too easily, especially to prevent movement of the chair caused by unintended weight shifts of larger occupants. The latch mechanism may lock the chair in one or more predetermined reclining positions.

The latch mechanism may comprise a sliding arm, which rotate relative to a latch disk, as the chair is reclined. The sliding arm may be spring-loaded, compressing a latch spring upon axial movement away from the latch disk. The sliding arm may comprise one or more protrusions, that engage one or more radially extending recesses in the latch disk as the chair reaches predetermined reclining positions. Vice versa, the sliding arm may comprise recesses that engage protrusions on the latch disk.

While the chair is in its upright position one or more protrusions at the sliding arm resiliently engage one or more recesses at the latch disk. When the chair is reclined the sliding arm rotates about an axle extending through the center of the latch disk. This forces the one or more protrusions of the sliding arm to leave the corresponding recesses at the latch disk. The sliding arm is pushed axially along its pivot axis in the center of the latch disk away from the latch disk, thereby compressing the latch spring. Upon reaching a second predetermined reclining position the protrusions at the sliding arm resiliently reengage a second set of recesses in the latch disk, causing the chair to assume a stable, predetermined reclining position. An adjustment force larger than the latch force is required to change the chair's position after it has reached one of its predetermined positions.

The latch disk may comprise a plurality of recesses to define a plurality of predetermined stable reclining positions. Similarly, the sliding arm may comprise a plurality of protrusions to define a plurality of predetermined stable reclining positions. Protrusions and recesses may be substituted for each other, i.e. the recesses may be located at the sliding arm and protrusions may be located at the latch disk.

The sliding arm and the latch disk of the latch mechanism may comprise a number of identical protrusions and/or recesses to cause the same latch force in each position. They may also comprise differently shaped protrusions and/or recesses to cause different latch forces for different reclining positions. Using different latch forces for different reclining positions can be used to compensate an undesirable effect: Without a latch mechanism the force required to adjust the chair out of its fully reclined position would be higher than the force required to adjust the chair out of an intermediate reclining position. Similarly, the force required to adjust the chair out of its upright position may be higher than the force required to adjust the chair out of an intermediate position. In an intermediate position the chair may be exactly balanced between rotating forward and backward, thus requiring almost no adjustment force. The required adjustment force is ultimately a function of where the occupant's center of gravity is located relative to the seat attachment axle. To require similar or equal adjustment forces in all three positions, the recesses of the latch disk associated with the upright position may have a shallow front exit, causing a relatively low latch force to exit the upright position. In the intermediate position the recesses may have a steeper angle to increase the latch force that must be overcome to adjust the chair out of the intermediate position.

The following detailed description of the invention is merely exemplary in nature and is not intended to limit the invention or the application and uses of the invention. Furthermore, there is no intention to be bound by any theory presented in the preceding background of the invention or the following detailed description of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is further explained with reference to the following drawings.

FIG. 1 a illustrates a known “health lounger” in an upright position.

FIG. 1 b illustrates the “health lounger” of FIG. 1 a in a reclined position.

FIG. 2 is a side view of an exemplary reclining lounge chair in the upright position.

FIG. 3 is a side view of the reclining lounge chair as in FIG. 2, shown in a fully reclined position.

FIG. 4 is a side view of the reclining lounge chair as in FIGS. 2 and 3, shown in a folded state.

FIG. 5 is a schematic view of the reclining lounge chair as in FIG. 2.

FIG. 6 is a schematic view of the reclining lounge chair as in FIG. 3.

FIG. 7 is a schematic view overlaying the schematic views of FIG. 5, FIG. 6, and a third intermediate reclining position.

FIGS. 8 a and 8 b are a side view and a top view of an exemplary latch mechanism showing the mechanism engaged in a first engaged state.

FIGS. 9 a and 9 b are showing the latch mechanism of FIGS. 8 a and 8 b in an intermediate position between a first and a second engaged state.

FIGS. 10 a and 10 b are showing the latch mechanism of FIGS. 8 a and 8 b after reaching a second engaged state.

FIG. 11 is a side view showing an alternative embodiment of a latch mechanism.

FIG. 12 is a larger, more detailed view of FIG. 11.

DETAILED DESCRIPTION

FIGS. 1 a and 1 b show a traditional couch, that has become known as a so called “health lounger”. It comprises an integral seat assembly 1, consisting of a backrest section 3, a center seat section 5 and a footrest section 7. The seat assembly 1 is a rigid unit, typically comprising an outer frame, in which a textile, slightly elastic and/or cushioned support is held.

The entire seat assembly 1 may pivot about seat attachment axle 9 relative to base frame 11. Base frame 11 typically comprises a left and a right base frame element 11′ which are laterally spaced apart, and in between which seat assembly 1 is located. Seat assembly 1 is connected to and held by base frame 11 only through seat attachment axle 9.

Base frame 11 typically comprises four feet 13, two on each side of seat assembly 1. Feet 13 are in contact with the floor 19, and are spaced appropriately far apart to provide sufficient stability.

Through a weight shift seat assembly 1 can be rotated as illustrated by arrow 15 in FIG. 1 a from an upright position illustrated in FIG. 1 a clockwise into a reclined position illustrated in FIG. 1 b. Seat assembly 1 thereby rotates about seat attachment axle 9. In the reclined position footrest 7 assumes an approximately horizontal orientation. Through a weight shift in the opposite direction, as illustrated by arrow 17 in FIG. 1 b, the chair can rotate back from the reclined position into the upright position, i.e. until the front end of footrest 7 touches the floor 19.

To facilitate the weight shift an armrest 6 is provided, which is connected to or forms a part of base frame 11.

Getting onto and out off such “health loungers” is difficult, because footrest 7 is always in a forward position in front of center seat 5. An improved design is proposed, and discussed with reference to FIG. 2 ff, whereby the same reference numbers have been used when referring to comparable parts.

Referring now to FIG. 2, an exemplary embodiment of an improved reclining lounge chair is illustrated. A seat assembly 1 is provided, comprising a backrest 3, a center seat member 5, and a footrest 7. Center seat member 5 and backrest 3 may form a subassembly, and assume a fixed, predetermined orientation to each other. The subassembly of center seat 5 and backrest 3 may be a single, rigid part.

Seat assembly 1 is pivotally connected to base frame 11, i.e. both the left and the right base frame members 11′, by a horizontal seat attachment axle 9. Seat attachment axle 9 may be a single shaft extending from the left frame member 11′ to the right frame member 11′. Seat attachment axle 9 may also consist of two independent attachment members, one each attached to left and right frame member 11′. Seat attachment axle 9 may be any connection known in the art to pivotally attach center seat member 5 to base frame 11.

Footrest 7 is connected to center seat member 5 by a horizontal footrest attachment axle 23, which footrest 7 may pivot about. Footrest attachment axle 23 may be a single shaft extending across the width of the footrest. Footrest attachment axle 23 may also comprise two independent attachment members, one on each side of footrest 7. Rotation of footrest 7 about footrest attachment axle 23 is controlled by footrest lift mechanism 25. Footrest lift mechanism 25 typically consists of a pair of footrest lift bars 25′, one on each side of the chair. The front end of each footrest lift bar 25′ is pivotally connected to footrest 7 with a front footrest lift axle 29. The rear end of each footrest lift bar 25′ is pivotally connected to the base frame 11 by a rear footrest lift axle 27.

Referring now to FIGS. 5 and 6, a footrest lift function line 31 is shown, which is a straight line extending from the front footrest lift axle 29 to the rear footrest lift axle 27. Also shown is a seat member function line 33, which is a straight line extending from footrest attachment axle 23 to seat attachment axle 9. As illustrated, the footrest lift axles 29 and 27 are positioned such that the footrest lift function line 31 and the seat member function line 33 intersect.

Referring back to FIG. 3, a rotation line or -plane 35 is illustrated, which intersects both footrest attachment axle 23 and front footrest lift axle 29. Footrest 7 can pivot around footrest attachment axle 23 relative to seat member 5. Footrest lift axle 29 pivotally connects footrest lift mechanism 25 to footrest 7.

Due to the disclosed geometry, an occupant's weight shift onto backrest 3, as illustrated by arrow 15 in FIG. 2, causes the subassembly of center seat member 5 and backrest 3 to rotate clockwise. The relative position between center seat member 5 and backrest 3 remains unchanged, since both are in a fixed relative alignment, and may form a single part. An occupant may hold onto armrest 6 to facilitate the weight shift. Armrest 6 may be connected to or form part base frame 11.

Clockwise rotation of seat assembly 1 around seat attachment axle 9 causes footrest lift mechanism 25 to pivot about rear footrest lift axle 27. Seat attachment axle 9 and rear footrest lift axle 27 are operatively connected to base frame 11 at different, fixed locations. Thus, center seat 5 and lift mechanism 25 have different pivot axes: Center seat 5 pivots about seat attachment axle 9, while footrest lift mechanism 25 pivots about rear footrest lift axle 27. This causes footrest attachment axle 23 to move relative to front footrest lift axle 29, as the chair is reclined. As illustrated in FIG. 2 in the chair's upright position front footrest lift axle 29 is in front of (i.e. appearing left of in the drawing) footrest attachment axle 23. In the chair's fully reclined position illustrated in FIG. 3, however, front footrest lift axle 29 is behind (i.e. appearing right of in the drawing) footrest attachment axle 23.

Rotation line 35, which indicates the relative position of footrest attachment axle 23 to front footrest lift axle 29, rotates at least 60°, preferably at least 80°, and especially 90°, when the lounge chair is adjusted from its upright position to its fully reclined position. The illustrated rotation of line 35 causes footrest 7 to rotate correspondingly. In the chair's upright position, as shown in FIG. 2, footrest 7 assumes an approximately vertical orientation towards the floor 19. In the reclined position, as shown in FIG. 3, footrest 7 assumes an approximately horizontal orientation. In the illustrated embodiment footrest 7 rotates about 90° between the chair's upright position and the chair's fully reclined position. This provides a comfortable reclined position, while also allowing an occupant to easily enter and exit the chair in the upright position.

One aspect of achieving the desired kinematics is illustrated in FIG. 3. As shown, rear footrest lift axle 27 is located below seat attachment axle 9, i.e. below horizontal line 37, which intersects seat attachment axle 9. Alternatively, or in addition thereto, footrest lift axle 27 may be located in front of seat attachment axle 9, i.e. on the left side of vertical line 27, which intersects seat attachment axle 9. Front footrest lift axle 29 may also be located above horizontal line 37.

Footrest lift mechanism 25 has an effective length that is determined by the distance between front footrest lift axle 29 and rear footrest lift axle 27. Correspondingly, center seat member 5 has an effective length that is determined by the distance between footrest attachment axle 23 and seat attachment axle 9. The effective length of footrest lift mechanism 25 may be 5%, and preferably more than 10%, shorter than the effective length of the center seat member 5.

Finally, favorable kinematics can also be achieved, if the distance between the seat attachment axle 9 and the rear footrest lift axle 29 is short relative to the height of seat attachment axle 9 over floor 19. The distance between seat attachment axle 9 and rear footrest lift axle 29 is preferably less than 25%, specifically less than 15%, less than 10%, less than 8% or even less than 6% of the height of seat attachment axle 9 over floor 19. On the other hand, the distance between seat attachment axle 9 and rear footrest lift axle 29 should not be selected too short. Favorably the distance between seat attachment axle 9 and rear footrest lift axle 29 may be more than 2%, more than 4%, 6%, 8% or 10% of the height of seat attachment axle 9 over floor 19. The same preferred distance ranges apply to the distance between front footrest lift axle 29 and footrest attachment axle 23.

The disclosed embodiment is esthetically pleasing, as both footrest lift bars 25′ of footrest lift mechanism 25 may be “hidden” behind an outer frame of center seat element 5. This can be achieved by disposing footrest lift bars 25′ immediately on the inside of the outer frame of center seat member 5.

FIG. 7 schematically illustrates the reclining mechanism, by superimposing a schematic view of the seat assembly 1 in the upright position, an intermediate reclined position, and the fully reclined position. The upright position is schematically also illustrated in FIG. 5, the fully reclined position schematically illustrated in FIG. 6.

Referring back to FIG. 2, a horizontal stop bar 65 is shown, which extends between the left and the right base frame members 11′ of base frame 11. Horizontal stop bar 65 provides a stop for backrest 3, thus limiting the movement of backrest 3, and defining the maximum reclined position. Stop bar 65 is located at the base frame 11 such, that in the thereby defined fully reclined position footrest 7 is oriented approximately horizontal.

In an alternative embodiment, backrest 3 may pivot relative to center seat member 5 by utilizing a separate mechanism, which is hinted in FIGS. 2 and 3 by showing a backrest attachment axle 41. In this embodiment a backrest locking mechanism must also be provided. It is possible to provide a backward stop element, which limits the maximum opening angle of backrest 3 against center seat member 5, but allows backrest 3 to tilt forward against center seat member 5 to accommodate a favorable storage position.

Referring to FIG. 4 it is shown, that the lounge chair may assume a storage position, e.g. to minimize the space required to store the lounge chair in extended periods without use, e.g. fall and winter. To achieve this, backrest 3 may rotate around backrest attachment axle 41 forward and towards center seat member 5. The chair can be folded further by removing rear footrest lift axle 27 from base frame 11. For this purpose rear footrest lift axle 27 may be attached to base frame 11 with screws, which can be removed with the help of a tool, e.g. a wrench or screwdriver, so that rear footrest lift axle 27 can be disconnected from base frame 11. This allows further folding of the chair, until footrest 7 is parallel to seat member 5. Base frame 11 may be designed such, that its front feet 13 can pivot around a front foot attachment axle 101, which is located close to armrest 6 at each base frame member 11′. This allows front feet 13 to swivel backward, further reducing the chair's storage size. In its storage position the chair may be reduced to a height of about 30 cm and a length of about 120 cm.

Even though the lounge chair can be operated as described, it may be further improved by providing a latch mechanism 51. This is to prevent the chair from accidentally reclining, e.g. by an unintentional weight shift of a larger occupant. Latch mechanism 51 may be located between any two parts of the chair that rotate relative to each other while reclining. A suitable location for locating latch mechanism 51 is around seat attachment axle 9, where center seat member 5 rotates relative to base frame 11. Another suitable location is around rear footrest lift axle 27, where footrest lift mechanism 25 rotates relative to base frame 11.

Latch mechanism 51 may be a friction mechanism, which increases the amount of torque required to rotate two parts against each other, e.g. footrest lift mechanism 25 against base frame 11. Latch mechanism 51 may also be a step mechanism, providing incremental torque when exiting predetermined recline positions.

An exemplary latch mechanism 51 is disclosed with reference to FIG. 8 a through 12. The disclosed latch mechanism comprises a latch disk 53, which may have the shape of a complete disk, or a partial disk. Latch disk 53 may be mounted torsionally rigid to the inside of base frame 11, e.g. around rear footrest lift axle 27. Footrest lift axle 27 will then pass through a hole located in the center of latch disk 53. Latch disk 53 comprises radially aligned and circumferentially spaced recesses 59 and protrusions 57. Protrusions 57 may be bars, noses, ribs, or any suitable convex feature. Recesses 59 may be notches, slots, grooves, indentations or any other suitable concave feature. Recesses 59 transition into protrusions 57 in form of slanted slopes 61.

Footrest lift bar 25′ of footrest lift mechanism 25 may comprise at least one protrusion 65 that is suitable to engage recesses 59 of latch disk 53. Alternatively, footrest lift bar 25′ may comprise at least one recess that is suitable to engage protrusions 57 of latch disk 53. Footrest lift bar 25′ may extend beyond footrest lift bar axle 27, and comprise two protrusions 65, one on each side of footrest lift bar axle 27, and each engaging latch disk 53 at opposite ends.

Referring to FIG. 11, footrest lift bar 25′ may move axially along footrest lift axle 27. Footrest lift bar 25′, which forms a sliding arm relative to latch disk 53, may be pushed towards latch disk 53 by a force acting in direction of arrow 68. This force may stem from pretensioned latch spring 67. Latch spring 67 may be supported by rearward support plate 69. Rearward support plate 69 may be held by a bushing 70 that surrounds footrest lift bar axle 27 (not shown).

To recline the lounge chair, an occupant may shift his or her weight, causing the entire seat assembly 1 to rotate about seat attachment axle 9. As previously described, this causes footrest lift bar 25′ to rotate about rear footrest lift bar axle 27. During this rotation protrusion 65 of footrest lift bar 25′ has to exit the corresponding recess 59 of latch disk 53. Latch disk 53 is connected torsionally rigid to base frame 11. Protrusion 65 exits recess 59 along tilted slope 61. FIG. 8 a illustrates protrusion 65 resiliently engaging recess 59. FIG. 9 a shows an intermediate position, in which footrest lift bar 25′ has rotated against latch disk 53, and protrusion 65 has exited recess 59. Lift bar protrusion 65 is now in contact with an opposite protrusion 57 on latch disk 53. The transition from a protrusion-recess alignment to a protrusion-protrusion alignment forces footrest lift bar 25′ to move axially along rear footrest lift bar axle 27 opposite the pretension of latch spring 67 and opposite the arrow 68 shown in FIG. 9 a. During further rotation, as shown in FIG. 10 a, lift bar protrusion 65, supported by latch spring 67, engages the next latch disk recess 59, thereby causing the chair to assume a relatively stable, resilient, latched position.

The amount of incremental torque provided by latch mechanism 51 when rotating footrest lift bar 25′ against base frame 11 depends on several factors, among them the force of spring 67, the size and height of protrusion 65, the height of protrusions 57 and recesses 59, and the angle of slope 61. Referring to FIGS. 8 a through 10 a it is illustrated, that all protrusions and recesses, as well as their height and their slopes 61 may be dimensioned equal. However, the inherent torque required to rotate footrest lift bar 25′ against base frame 11 (i.e. without latch mechanism 51) may vary for different chair positions. To equalize the adjustment force required to recline the chair from each locked position to the next if may therefore be desirable to create an inverted torque profile for latch mechanism 51. Latch mechanism 51 can be designed such, that the latch torque is small for reclining positions that naturally require high adjustment forces, and vice versa latch torque is high for reclining positions that naturally require low adjustment forces.

As illustrated in FIGS. 11 and 12, the slope angles α, β, or χ relating to the slopes 61 may be selected differently, as may width 57 a of the protrusions 57, so that different “exit angles” cause different incremental torque when entering or leaving various seating or reclined positions. Exiting a particular latched position may require different amount of torque, depending on which position is to be exited.

Finally, other latching or adjustment mechanisms are possible, e.g. in the kind of a locking brake, e.g. to secure the chair in an intermediate position, such that unintentional adjustment is no longer possible.

While the present invention has been described with reference to exemplary embodiments, it will be readily apparent to those skilled in the art that the invention is not limited to the disclosed or illustrated embodiments but, on the contrary, is intended to cover numerous other modifications, substitutions, variations and broad equivalent arrangements that are included within the spirit and scope of the following claims. 

1. A reclining lounge chair, comprising: a center seat member; a backrest, the backrest being operatively connected to the center seat member; a footrest, the footrest being pivotally connected to the center seat member by a footrest attachment axle; wherein the center seat member, the backrest, and the footrest form a seat assembly, which is pivotally connected to a base frame by a seat attachment axle at the center seat member, and wherein the seat assembly may rotate about the seat attachment axle between an upright position and a fully reclined position without changing the relative alignment of backrest and center seat section; a footrest lift mechanism, the front end of the footrest lift mechanism being pivotally connected to the footrest by a front footrest lift axle, and the rear end of the footrest lift mechanism being pivotally connected to the base frame by a rear footrest lift axle; wherein the rear footrest lift axle is located below the seat attachment axle, and wherein the footrest lift mechanism causes the footrest to rotate about the footrest attachment axle by more than 60° but less than 125° when the seat assembly is rotated from the upright position to the fully reclined position.
 2. The reclining chair as in claim 1, wherein the footrest rotates by more than 80° about the footrest attachment axle when the seat assembly is rotated from the upright position to the fully reclined position.
 3. The reclining chair as in claim 1, wherein the footrest rotates by less than 100° about the footrest attachment axle when the seat assembly is rotated from the upright position to the fully reclined position.
 4. The reclining chair as in claim 1, wherein the rear footrest lift axle is located forward of the seat attachment axle.
 5. The reclining chair as in claim 1, wherein the rear footrest lift axle is located below the seat attachment axle.
 6. The reclining chair as in claim 1, wherein during regular use the backrest is at a predetermined, fixed angle relative to the center seat member, and wherein the backrest can be folded onto the center seat member to assume a storage position.
 7. The reclining chair as in claim 1, wherein the rear footrest lift axle is located above the seat attachment axle.
 8. The reclining chair as in claim 1, wherein the front footrest lift axle is forward of the footrest attachment axle while the chair is in its upright position.
 9. The reclining chair as in claim 1, wherein the front footrest lift axle is rearward of the footrest attachment axle while the chair is in its fully reclined position.
 10. The reclining chair as in claim 1, wherein the distance between the seat attachment axle and the rear footrest lift axle is less than 15% of the height of the seat attachment axle from the floor.
 11. The reclining chair as in claim 1, wherein the distance between the footrest attachment axle and the front footrest lift axle is less than 15% of the height of the seat attachment axle from the floor.
 12. The reclining chair as in claim 1, wherein the front footrest lift axle is at a height between the footrest attachment axle and the floor.
 13. The reclining chair as in claim 1, wherein the base frame comprises two base frame members, one of which is located left of the seat assembly and one of which is located right of the seat assembly, and wherein the footrest lift mechanism comprises two footrest lift bars, which are located inside of and adjacent to each of the two base frame members.
 14. The reclining chair as in claim 1, further comprising a latch mechanism, which latches the chair in one of two or more predetermined reclining positions.
 15. The reclining chair as in claim 14, wherein the latch mechanism is located between two parts of the chair that rotate relative to each other while reclining.
 16. The reclining chair as in claim 14, wherein the latch mechanism is located on the inside of the base frame around the rear footrest lift axle.
 17. The reclining chair as in claim 14, wherein the latch mechanism comprises a latch disk with alternating radially aligned protrusions and recesses that is attached torsionally rigid to the base frame, and a sliding element which rotates about the disk's center axis, wherein the sliding element comprises at least one protrusion, which is pushed into the latch disk by a latch spring.
 18. The reclining chair as in claim 17, comprising two or more identical protrusions and recesses.
 19. The reclining chair as in claim 17, comprising two or more protrusions and recesses which are different in at least one of size, width, and slope angle. 